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  Cup point in JIS standards : JIS B1177
  • JIS is an abbreviation for Japanese Industrial Standards.
  • JIS B1177 is JIS standard for hexagon socket set screws.
Cup Point
Cup Point Set Screw
Nominal diameter 
 M1.6
 

 M1.7
 

 M2
 

 M2.5
 

 M2.6
 

 M3
 

 M4
 

 M5
 
length (mm)
1
  • The overall length shorter than 2 mm are not included in the JIS standard, but they are included in the slotted set screws in DEL standard.
  • The nominal diameter M1.7 and M2.6 are not included in the JIS standard, but they are included in the DEL standard.
  • Click each Nominal diameter to display a list of "tip shapes" and "overall lengths" by its nominal diameter in the DEL standard.
  • Click each length to display a list of "tip shapes" and "nominal diameters" by its overall length in the DEL standard.
  • The overall length of 16 mm or more is in the JIS standard, but not in the DEL standard.
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
2 M1.6x2 M2x2
2.5 M1.6x2.5 M2x2.5 M2.5x2.5
3 M1.6x3 M2x3 M2.5x3 M3x3
4 M1.6x4 M2x4 M2.5x4 M3x4 M4x4
5 M1.6x5 M2x5 M2.5x5 M3x5 M4x5
6 M1.6x6 M2x6 M2.5x6 M3x6 M4x6 M5x6
8 M1.6x8 M2x8 M2.5x8 M3x8 M4x8 M5x8
10 M2x10 M2.5x10 M3x10 M4x10 M5x10
12 M2.5x12 M3x12 M4x12 M5x12
16 M3x16 M4x16 M5x16
20 M4x20 M5x20
25 M5x25

  • For example, M1.6x2 size is the nominal diameter M1.6, length 2 mm.